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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Billions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Cash equivalents | $ 38.4 | $ 14.4
Investment, Type [Extensible Enumeration] | us-gaap:USTreasuryBillSecuritiesMember | us-gaap:USTreasuryBillSecuritiesMember
Unsettled purchases of U.S. Treasury Bills | $ 23.2 | $ 12.8

X
- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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